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Commit 5d1a03dc authored by Steven Rostedt's avatar Steven Rostedt
Browse files

function-graph: moved the timestamp from arch to generic code 



This patch move the timestamp from happening in the arch specific
code into the general code. This allows for better control by the tracer
to time manipulation.

Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
parent 09833521

arch/x86/kernel/ftrace.c

+1 −5
Original line number Original line Diff line number Diff line
@@ -410,7 +410,6 @@ int ftrace_disable_ftrace_graph_caller(void) 
void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)

void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)

{

{

	unsigned long old;

	unsigned long old;

	unsigned long long calltime;

	int faulted;

	int faulted;

	struct ftrace_graph_ent trace;

	struct ftrace_graph_ent trace;

	unsigned long return_hooker = (unsigned long)

	unsigned long return_hooker = (unsigned long)
@@ -453,10 +452,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) 
		return;

		return;

	}

	}





	calltime = trace_clock_local();

	if (ftrace_push_return_trace(old, self_addr, &trace.depth) == -EBUSY) {



	if (ftrace_push_return_trace(old, calltime,

				self_addr, &trace.depth) == -EBUSY) {

		*parent = old;

		*parent = old;

		return;

		return;

	}

	}

include/linux/ftrace.h

+1 −2
Original line number Original line Diff line number Diff line
@@ -369,8 +369,7 @@ struct ftrace_ret_stack { 
extern void return_to_handler(void);

extern void return_to_handler(void);





extern int

extern int

ftrace_push_return_trace(unsigned long ret, unsigned long long time,

ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth);

			 unsigned long func, int *depth);

extern void

extern void

ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret);

ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret);

kernel/trace/trace_functions_graph.c

+5 −3
Original line number Original line Diff line number Diff line
@@ -57,9 +57,9 @@ static struct tracer_flags tracer_flags = { 




/* Add a function return address to the trace stack on thread info.*/

/* Add a function return address to the trace stack on thread info.*/

int

int

ftrace_push_return_trace(unsigned long ret, unsigned long long time,

ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth)

			 unsigned long func, int *depth)

{

{

	unsigned long long calltime;

	int index;

	int index;





	if (!current->ret_stack)

	if (!current->ret_stack)
@@ -71,11 +71,13 @@ ftrace_push_return_trace(unsigned long ret, unsigned long long time, 
		return -EBUSY;

		return -EBUSY;

	}

	}





	calltime = trace_clock_local();



	index = ++current->curr_ret_stack;

	index = ++current->curr_ret_stack;

	barrier();

	barrier();

	current->ret_stack[index].ret = ret;

	current->ret_stack[index].ret = ret;

	current->ret_stack[index].func = func;

	current->ret_stack[index].func = func;

	current->ret_stack[index].calltime = time;

	current->ret_stack[index].calltime = calltime;

	*depth = index;

	*depth = index;





	return 0;

	return 0;